build(deps-dev): bump autoprefixer from 10.4.17 to 10.4.18

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 10.4.17 to 10.4.18.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](postcss/autoprefixer@10.4.17...10.4.18)

---
updated-dependencies:
- dependency-name: autoprefixer
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -71,7 +71,7 @@
     "@pattern-lab/engine-handlebars": "^6.1.0",
     "@pattern-lab/starterkit-handlebars-demo": "^6.1.0",
     "@pattern-lab/uikit-workshop": "^6.1.0",
-    "autoprefixer": "^10.4.17",
+    "autoprefixer": "^10.4.18",
     "backstopjs": "^6.3.22",
     "cpr": "^3.0.1",
     "cssnano": "^6.0.5",